[Ffmpeg-devel-irc] ffmpeg.log.20171028

[burek]

[01:46:01 CEST] <romano2k> hello! is there a recommended command line generator for ffmpeg?
[01:46:31 CEST] <romano2k> or even a web ui?
[02:06:04 CEST] <Johnjay> furq: so you have ff and ff dev also? my dev is 57 but my regular is still 56
[02:10:49 CEST] <furq> no i just have ff beta
[02:20:27 CEST] <Johnjay> i did as you suggested and installed tampermonkey on my dev version
[02:20:34 CEST] <Johnjay> now to figure out how to write scripts for it.
[02:20:58 CEST] <Johnjay> my ultimate goal is rather modest. i just want certain image and pastebin sites to auto load images in this irc webchat window on mouse hover
[02:41:01 CEST] <furq> http://www.blurayreviews.ch/reviews/screenshots/predator-ultimate-hunter-edition/pix/predator-ultimate-hunter-edition_15.jpg
[02:41:04 CEST] <furq> who here likes denoising
[02:41:34 CEST] <DHE> rose, how could you not realize mickey was replaced by a plastic monster?
[02:43:00 CEST] <furq> that's before and after he got hit by ivan drago
[03:20:54 CEST] <iive> furq: the left side looks like it is from PAL capture
[03:21:07 CEST] <furq> the original bluray is an m2v bd25
[03:21:10 CEST] <furq> so yeah, that's no good either
[03:21:38 CEST] <furq> so you get to choose between macroblocking and madame tussauds
[03:23:10 CEST] <iive> i definitely like the right part more, it doesn't look that much like a wax figure ;)
[03:26:36 CEST] <iive> on the right image, the eyebrow looks like it is painted.
[04:10:41 CEST] <AndrewMock> I need to do precise MXF work. Is ffmbc my best bet?
[04:12:19 CEST] <AndrewMock> also, any buzz on implementing the CineForm SDK?
[09:21:02 CEST] <Ahti333> in libavformat, is there a way to set output-format specific flags via the C api? in particular, i want to set FF_MOV_FLAG_FASTSTART on the mov output format
[09:28:23 CEST] <Ahti333> nvm, just found the avoptions stuff
[11:44:56 CEST] <danieel> relaxed: i could not manage with rawvideo, it only supports uncompressed formats
[11:46:08 CEST] <danieel> relaxed: i did use MP4Box and the NHML format (xml description of what the frames sizes are) - created by hand / simple php based parser, to actually wrap the prores bitstream to mov
[11:46:18 CEST] <danieel> then mov to png with ffmpeg of course
[13:55:33 CEST] <aphirst> Hi guys! I'm trying to build ffmpeg-headless in the arch user repository, and have a question about the build error, the answer to which I'd like to be able to forward to the package 'maintainer'
[13:55:51 CEST] <aphirst> for context, it's ffmpeg but with X (and maybe other?) dependencies removed
[13:56:46 CEST] <aphirst> https://aur.archlinux.org/packages/ffmpeg-headless/#news My comment just now shows a build failure, and it seems related to openjpeg. My gut feeling is that maybe ffmpeg has now moved onto openjpeg instead of openjpeg2, but that this isn't incorporated into the PKGBUILD (build/package script) by the maintainer here on the AUR
[14:02:42 CEST] <aphirst> oh I see, openjpeg is actually 1.5, openjpeg2 is 2.x
[14:02:47 CEST] <aphirst> in my distro at least
[14:03:03 CEST] <aphirst> in any case, the issue seems to be somehow to do with the build system and openjpeg
[15:47:22 CEST] <cousin_luigi> Greetings.
[15:47:30 CEST] <cousin_luigi> What's the story with ebur and ffmpeg?
[15:50:06 CEST] <jeff_> hi
[15:50:16 CEST] <jeff_> requesting for a help
[15:50:26 CEST] <jeff_> anyone can spare few minute,
[15:51:13 CEST] <jeff_> when i try to encode a stream it throw this error: non-existing PPS 0 referenced
[15:51:19 CEST] <jeff_> this is because it cant find a valid key frame
[15:51:24 CEST] <jeff_> the key frame comes too late
[15:51:41 CEST] <jeff_> how to keep ffmpeg alive until it find a valid keyframe
[15:54:34 CEST] <jeff_> guys
[15:57:29 CEST] <jeff_> hello
[15:59:21 CEST] <iive> jeff_: no idea sorry
[16:00:11 CEST] <iive> jeff_: keep asking or even fill a bug. It's .ts stream, isn't it? sometime I workaround it by having -ss 1 , aka seek a second, but if you need it automated, that's not really a solution.
[16:02:13 CEST] <jeff_> hmm
[16:03:05 CEST] <jeff_> u seen this error: No longer receiving playlist 2
[16:03:20 CEST] <jeff_>  A TLS packet with unexpected length was received.=2455.5kbits/s
[16:03:50 CEST] <jeff_> its an m3u8 so yes inside it contains .ts files i assume
[16:10:13 CEST] <iive> no idea.
[17:22:18 CEST] <RedFlash> Hello, I can't figure out how to convert a bunch of pngs to a VP9 webm file. The PNGs aren'
[17:24:14 CEST] <ChocolateArmpits> RedFlash, are they numerated ?
[17:25:26 CEST] <RedFlash> Sorry about that.. They aren't sequenced like 1,2,3 more like 12_20,12_25,12_30 ... The command I'm using at the moment produces a webm file with the terminal literally listing every file specified.
[17:26:45 CEST] <RedFlash> The command I'm using is here https://pastebin.com/mYmj53sj
[17:28:46 CEST] <ChocolateArmpits> RedFlash, for sequences you should use image2 format https://pastebin.com/mYmj53sj you can specify particulars of the pattern used
[17:30:37 CEST] <RedFlash> How does that work exactly? Could you point me to some examples?
[17:30:52 CEST] <ChocolateArmpits> Open the link, it has examples and parameters specified
[17:31:15 CEST] <RedFlash> ChocolateArmpits, you pasted my link
[17:31:29 CEST] <ChocolateArmpits> oh snap sorry
[17:31:36 CEST] <ChocolateArmpits> got confused, here it is https://ffmpeg.org/ffmpeg-formats.html#image2-1
[17:35:42 CEST] <RedFlash> ChocolateArmpits: Ahh now it works! Thanks for your help! Got it working with this https://pastebin.com/fmkhbfKY
[17:36:06 CEST] <ChocolateArmpits> cool
[17:44:20 CEST] <RedFlash> ChocolateArmpits: Got another question if you're up for it. The video works, but the framerate is kind of unstable. Is it possible to lock the framerate or make it more stable somehow? Video is ~300kb, accessible here https://mega.nz/#!GV1CVRDL!7HUf364l4mBUcg2LXLHJDkh_rAtiTuK3K_flOnp-5uw
[17:46:51 CEST] <ChocolateArmpits> RedFlash, what do you mean unstable?
[17:47:23 CEST] <ChocolateArmpits> You want to interpolate between frames?
[17:48:47 CEST] <relaxed> RedFlash: this may help https://trac.ffmpeg.org/wiki/Slideshow
[17:51:30 CEST] <RedFlash> Hang on, never mind. I think I got the wrong values. It just seemed a bit jittery on higher framerates
[17:59:57 CEST] <RedFlash> Okay, something really weird is happening here. When I create the video from the PNGs as a WEBM with VPX9, it stutters on playback. When I create the video as an MP4 with libx264 with the EXACT same command, it plays smoothly. Commands: https://pastebin.com/ddxpkv1q
[18:02:20 CEST] <relaxed> that should be, ffmpeg -framerate 10 ...
[18:03:50 CEST] <RedFlash> Fixed it, but still no improvements
[18:05:28 CEST] <relaxed> pastebin the command and output from both runs
[18:06:43 CEST] <ChocolateArmpits> RedFlash, what are you using for playback
[18:07:09 CEST] <RedFlash> VLC on Ubuntu
[18:08:20 CEST] <ChocolateArmpits> RedFlash, do you have any other vp9 videos to try out  ?
[18:08:29 CEST] <ChocolateArmpits> besides the ones that you encoded now
[18:08:40 CEST] <relaxed> or maybe test with ffplay or mpv
[18:08:44 CEST] <RedFlash> I don't, unfortunately
[18:08:46 CEST] <ChocolateArmpits> or those
[18:08:50 CEST] <RedFlash> I'll test it with another player
[18:10:29 CEST] <RedFlash> WOW. VLC can't play VP9 files very well :( Thanks for your time relaxed & ChocolateArmpits
[18:10:56 CEST] <ChocolateArmpits> is it an old version?
[18:14:31 CEST] <RedFlash> It's not too far behind. They're on v2.2.6, I'm on v2.2.2.
[18:20:22 CEST] <blap> it's nice having a decent computer
[20:34:11 CEST] <utack> Hi. I wanted to convert something HEVC HDR to a different resolution HEVC HDR. how does one keep/copy all that metadata required for correct playback? Thanks
[20:35:22 CEST] <utack> do i have to use media info and pass that stuff to x265 manually?
[21:02:22 CEST] <relaxed> utack: try encoding a small sample and see if it copies the metadata my default
[21:04:49 CEST] <utack> relaxed thanks for the hint, unfortunately no. i guess i have manually pass all the options to x265
[21:11:40 CEST] <relaxed> utack: ffmpeg -i input .... -c:v hevc -x265-params "colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc" output
[21:16:42 CEST] <relaxed> utack: https://pastebin.com/raw/0TMgnuEM
[21:17:55 CEST] <sfan5> that's not 1080p by the way
[21:18:15 CEST] <relaxed> oh, my scale was backwards :)
[21:18:31 CEST] <sfan5> looks correct to me though
[21:18:44 CEST] <sfan5> if in doubt open both files in a media player at the same frame and compare
[21:34:17 CEST] <utack> relaxed yeah it keeps these settings  but not all that extra nonsense like mastering display metadata
[21:39:59 CEST] <relaxed> from doom9, not sure if it's correct thought:  -x265-params colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:master-display="G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1)":max-cll="1000,400"
[21:41:29 CEST] <utack> thanks for that, i guess i can stuff in the master display parameters mediainfo tells me on the source
[21:42:51 CEST] <relaxed> good idea, you could probably script it for future conversions
[21:45:12 CEST] <relaxed> utack: http://x265.readthedocs.io/en/default/cli.html
[21:45:44 CEST] <utack> yeah i was looking at that, you found the missing piece (how the options are called in ffmpeg) in that doom9 command line
[22:10:59 CEST] <utack> thanks relaxed, it works now
[00:00:00 CEST] --- Sun Oct 29 2017